The Soil Moisture Active Passive (SMAP) Mission
Dara Entekhabi,Eni G. Njoku,Peggy O'Neill,Kent Kellogg,Wade T. Crow,W. Edelstein,Jared Entin,Shawn D Goodman,Thomas J. Jackson,Joel T. Johnson,John S. Kimball,Jeffrey R. Piepmeier,Randal D. Koster,Neil R.W. Martin,Kyle C. McDonald,Mahta Moghaddam,Susan Moran,Rolf H. Reichle,Jiancheng Shi,Michael W. Spencer,Samuel W Thurman,Leung Tsang,Jakob van Zyl +22 more
- Vol. 98, Iss: 5, pp 704-716
TLDR
The Soil Moisture Active Passive mission is one of the first Earth observation satellites being developed by NASA in response to the National Research Council's Decadal Survey to make global measurements of the soil moisture present at the Earth's land surface.Abstract:
The Soil Moisture Active Passive (SMAP) mission is one of the first Earth observation satellites being developed by NASA in response to the National Research Council's Decadal Survey SMAP will make global measurements of the soil moisture present at the Earth's land surface and will distinguish frozen from thawed land surfaces Direct observations of soil moisture and freeze/thaw state from space will allow significantly improved estimates of water, energy, and carbon transfers between the land and the atmosphere The accuracy of numerical models of the atmosphere used in weather prediction and climate projections are critically dependent on the correct characterization of these transfers Soil moisture measurements are also directly applicable to flood assessment and drought monitoring SMAP observations can help monitor these natural hazards, resulting in potentially great economic and social benefits SMAP observations of soil moisture and freeze/thaw timing will also reduce a major uncertainty in quantifying the global carbon balance by helping to resolve an apparent missing carbon sink on land over the boreal latitudes The SMAP mission concept will utilize L-band radar and radiometer instruments sharing a rotating 6-m mesh reflector antenna to provide high-resolution and high-accuracy global maps of soil moisture and freeze/thaw state every two to three days In addition, the SMAP project will use these observations with advanced modeling and data assimilation to provide deeper root-zone soil moisture and net ecosystem exchange of carbon SMAP is scheduled for launch in the 2014-2015 time frameread more
Citations
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Journal ArticleDOI
Developing an improved soil moisture dataset by blending passive and active microwave satellite-based retrievals
Yi Y. Liu,Yi Y. Liu,Yi Y. Liu,Robert Parinussa,Wouter Dorigo,R.A.M. de Jeu,Wolfgang Wagner,A. I. J. M. van Dijk,Matthew F. McCabe,Jason P. Evans +9 more
TL;DR: In this article, the retrieval characteristics of passive (AMSR-E) and active (ASCAT) microwave satellite estimates are combined to produce an improved soil moisture product. But the results of the satellite-based passive and active microwave sensors have the potential to offer improved estimates of surface soil moisture at global scale.
Journal ArticleDOI
Upscaling sparse ground‐based soil moisture observations for the validation of coarse‐resolution satellite soil moisture products
Wade T. Crow,Aaron A. Berg,Michael H. Cosh,Alexander Loew,Binayak P. Mohanty,Rocco Panciera,Patricia de Rosnay,Dongryeol Ryu,Jeffrey P. Walker +8 more
TL;DR: In this paper, the authors describe the magnitude of the soil moisture upscaling problem and measurement density requirements for ground-based soil moisture networks, and summarize a number of existing soil moisture-upscaling strategies which may reduce the detrimental impact of spatial sampling errors on the reliability of satellite soil moisture validation using spatially sparse ground based observations.
Journal ArticleDOI
Land cover changes and their biogeophysical effects on climate
Rezaul Mahmood,Roger A. Pielke,Kenneth G. Hubbard,Dev Niyogi,Paul A. Dirmeyer,Clive McAlpine,Andrew M. Carleton,Robert Hale,Samuel Gameda,Adriana Beltrán-Przekurat,Bruce Baker,Richard T. McNider,David R. Legates,Marshall Shepherd,Jinyang Du,Peter D. Blanken,Oliver W. Frauenfeld,U. S. Nair,Souleymane Fall +18 more
TL;DR: In this article, the authors provide an overview and synthesis of some of the most notable types of land cover changes and their impacts on climate, including agriculture, deforestation and afforestation, desertification, and urbanization.
Journal ArticleDOI
Remote sensing of drought: Progress, challenges and opportunities
Amir AghaKouchak,A. Farahmand,Forrest Melton,João Paulo Teixeira,Martha C. Anderson,Brian D. Wardlow,Christopher Hain +6 more
TL;DR: A review of current and emerging drought monitoring approaches using satellite remote sensing observations from climatological and ecosystem perspectives is presented in this paper, where the authors argue that satellite observations not currently used for operational drought monitoring, such as near-surface air relative humidity data from the Atmospheric Infrared Sounder mission, provide opportunities to improve early drought warning.
Journal ArticleDOI
Surface water inundation in the boreal-Arctic: potential impacts on regional methane emissions
TL;DR: In this article, a satellite data driven model investigation of the combined effects of surface warming and moisture variability on high northern latitude (⩾45° N) wetland emissions, by considering sub-grid scale changes in fractional water inundation (Fw) at 15 day, monthly and annual intervals using 25km resolution satellite microwave retrievals, and the impact of recent (2003-11) wetting/drying on northern CH4 emissions.
References
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